Debt (Details) Part 2 In Thousands, unless otherwise specified	6 Months Ended				3 Months Ended	6 Months Ended				3 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 JPMorgan Chase Bank, National Association USD ($)	Jun. 30, 2014 Prudential Investment Management, Inc. USD ($)	Mar. 31, 2014 Series A notes USD ($)	Jun. 30, 2014 Series A notes USD ($)	Jun. 30, 2014 Series B notes USD ($)	Jun. 30, 2014 Royal Bank of Scotland Citizaens, N.A. USD ($)	Jun. 30, 2014 Royal Bank of Scotland Citizaens, N.A. EUR (€)	Mar. 31, 2014 HSBC Bank (China) Company Limited, Shanghai Branch USD ($)	Jun. 30, 2014 HSBC Bank (China) Company Limited, Shanghai Branch USD ($)
Line of Credit Facility
Amount outstanding			$ 10,000	$ 18,000				$ 0			$ 0
Weighted average interest rate			1.46%
Expiration date			Mar. 01, 2018
Face amount						8,000	10,000
Interest rate, stated percentage						4.00%	4.10%
Maturity date range, start						Mar. 11, 2014	Jun. 01, 2015
Maturity date range, end						Mar. 11, 2018	Jun. 01, 2021
Repayments of Long-term Debt					2,000
Repayments of Short-term Debt	1,500	0								1,500
Issuance period expiration date				Jul. 24, 2015
Note term						7 years	10 years
Maximum borrowing capacity								$ 2,738	€ 2,000		$ 5,000